115551720 has 192 divisors, whose sum is σ = 404352000. Its totient is φ = 28514304.

The previous prime is 115551697. The next prime is 115551721. The reversal of 115551720 is 27155511.

It is not an unprimeable number, because it can be changed into a prime (115551721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 483361 + ... + 483599.

It is an arithmetic number, because the mean of its divisors is an integer number (2106000).

Almost surely, 2^115551720 is an apocalyptic number.

115551720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115551720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202176000).

115551720 is an abundant number, since it is smaller than the sum of its proper divisors (288800280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115551720 is a wasteful number, since it uses less digits than its factorization.

115551720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 115551720 is about 10749.4985929577. The cubic root of 115551720 is about 487.0708491498.

The spelling of 115551720 in words is "one hundred fifteen million, five hundred fifty-one thousand, seven hundred twenty".